Born in the late 70s, so also mid-40s, I worked retail in the 90s and older pricing guns often used a raised · rather than one aligned with the baseline, so I didn't doubt that it might have been common, or even official, in the past, when I read it. Such guns would sometimes have “old style” alignment with the baseline for the numbers¹ too.

The “still in use today” part is quite definitely wrong though.

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[1] https://en.wikipedia.org/wiki/Arabic_numeral_variations#Old-...